Massey 590 drivetrain 4wd question?

[Tomtrac]

You have a shaft out of the gearbox-transfer box under the clutch/cab and shaft out of the diff axle
there should be a shaft that goes between these shafts with the same splines/teeth on then there should be two couplings about 7'' long with the same splines inside you slide these on the middle long shaft one at each end then with shaft in place slide the couplings one forward and one back to overlap each end shaft and the long middle one then as above there should be a hole in the middle of both couplings to put a split pin or nail threw and bend over so the coupling can move a little backwards and forwards but the nail pin stops them moving of the shafts as the nail pin comes against the ends of the shafts

 

[HDAV]

The splines don't look much different to new, is that the collar to the right ?

I believe so, but its my guessing the collar has slid forward (or been slid forward towards the front axle) and hasn't been connected for a while as the splines are dry and covered in brown dry rusty stuff no grease etc my guess and its just guess is the 4wd is seized and the prop shaft was taken off to make it easier to drive. Whether this happened before it was purchased i couldn't say.

 

[multi power]

I believe so, but its my guessing the collar has slid forward (or been slid forward towards the front axle) and hasn't been connected for a while as the splines are dry and covered in brown dry rusty stuff no grease etc my guess and its just guess is the 4wd is seized and the prop shaft was taken off to make it easier to drive. Whether this happened before it was purchased i couldn't say.

4wd very unlikely to be seized

 

[HDAV]

4wd very unlikely to be seized

What about the knob? If its the one i am thinking of it doesn't looked like its moved for a while.

Will get pictures.

 

[wasted years]

What about the knob? If its the one i am thinking of it doesn't looked like its moved for a while.

Will get pictures.

If the 4wd drive was seized the whole tractor would not move, if the front diff was damaged it is difficult to see how pulling back the coupler would help.
More likely it sliped back of its own accord and was left like that.
How many hours on the tractor?

 

[HDAV]

Hours good question the rev counter is dead and seems the hour meter stopped long ago.... but will check i might take a pin down and see if it slips back on, the thrust bearing was replaced not so long ago so would have expected it to have been refitted then unless it was and the pin fell out recently? if the 4wd was not engaged the splines would move by hand with engine off? 4wd engaged splines wont move?

 

[wasted years]

If they are like the 3000 range they need oil pressure to be in 2wd but I don't know how that range work.
One way is to slide coupling into place and drive round yard putting knob in and out (I'm laughing as I type) you will feel 4wd clunk in and out.
Steering lock is greatly affected by 4wd being in.

 

[HDAV]

If they are like the 3000 range they need oil pressure to be in 2wd but I don't know how that range work.
One way is to slide coupling into place and drive round yard putting knob in and out (I'm laughing as I type) you will feel 4wd clunk in and out.
Steering lock is greatly affected by 4wd being in.

well we dont have a yard to play in so hope car park is quiet tomorrow and i'll have a go....

 

[wasted years]

well we dont have a yard to play in so hope car park is quiet tomorrow and i'll have a go....

I can picture the courtroom scene,
'Well your honour, a man called wasted years told me, erm on line to go round and round in circles in the car park putting my knob in and out'
Straight to jail.

 

[MF-ANDY]

If they are like the 3000 range they need oil pressure to be in 2wd but I don't know how that range work.
One way is to slide coupling into place and drive round yard putting knob in and out (I'm laughing as I type) you will feel 4wd clunk in and out.
Steering lock is greatly affected by 4wd being in.

not like 3000 series. need pressure to engage on 500 series.

 

[MF-ANDY]

Hours good question the rev counter is dead and seems the hour meter stopped long ago.... but will check i might take a pin down and see if it slips back on, the thrust bearing was replaced not so long ago so would have expected it to have been refitted then unless it was and the pin fell out recently? if the 4wd was not engaged the splines would move by hand with engine off? 4wd engaged splines wont move?

yes 4wd off or engine stopped splined shaft coming out of rear drop box should turn by hand. engine running and 4wd engaged splined shouldn't turn by hand. spline coming out of front step up box should turn a bit either way due to back lash. either way you if its an early model you will only ever have 3 wheel drive as they didn't have diff lock on the early front axles

 

[deere66]

If the tractor has been split to do the thrust bearing could it be that the coupler got forgotten about?

 

[HDAV]

So how I get 4wd shaft coupler is back on

Just need to get a pin in it and test have half an hour or so of god light

 

[HDAV]

Or

 

[MF-ANDY]

So how I get 4wd shaft coupler is back on

Just need to get a pin in it and test have half an hour or so of god light

the 4wd knob should be at the back of this picture. just in front of where the red painted panel starts to bend upwards
The lever to the right in this picture is for pto. The one on the left is for the selector valve.

 

[MF-ANDY]

Or

The pedal on the floor is rear difflock. The missing levers are for spool valves and the other knob is response/rate of drop knob

 

[towbar]

This is 4wd lever should pull in and out

 

[bill and bens dad]

what was the previous owner?a boatyard/launcher?

 

[HDAV]

what was the previous owner?a boatyard/launcher?

No idea but current is its used for beach launching boats

Many thanks will have to test the 4wd function another time I did get coupler back on and secured with a papaerclip! Didn't have a long yet thin enough cotter pin......

 

[HDAV]

This is 4wd lever should pull in and out

How far should it move 1/2" or 2" sort of range?